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332 lines
11 KiB
C++
332 lines
11 KiB
C++
/**************************************************************************/
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/* audio_stream_polyphonic.cpp */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#include "audio_stream_polyphonic.h"
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#include "audio_stream_polyphonic.compat.inc"
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#include "scene/main/scene_tree.h"
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#include "servers/audio_server.h"
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constexpr uint64_t ID_MASK = 0xFFFFFFFF;
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constexpr uint64_t INDEX_SHIFT = 32;
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Ref<AudioStreamPlayback> AudioStreamPolyphonic::instantiate_playback() {
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Ref<AudioStreamPlaybackPolyphonic> playback;
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playback.instantiate();
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playback->streams.resize(polyphony);
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return playback;
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}
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String AudioStreamPolyphonic::get_stream_name() const {
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return "AudioStreamPolyphonic";
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}
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bool AudioStreamPolyphonic::is_monophonic() const {
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return true; // This avoids stream players to instantiate more than one of these.
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}
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void AudioStreamPolyphonic::set_polyphony(int p_voices) {
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ERR_FAIL_COND(p_voices < 0 || p_voices > 128);
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polyphony = p_voices;
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}
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int AudioStreamPolyphonic::get_polyphony() const {
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return polyphony;
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}
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void AudioStreamPolyphonic::_bind_methods() {
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ClassDB::bind_method(D_METHOD("set_polyphony", "voices"), &AudioStreamPolyphonic::set_polyphony);
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ClassDB::bind_method(D_METHOD("get_polyphony"), &AudioStreamPolyphonic::get_polyphony);
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ADD_PROPERTY(PropertyInfo(Variant::INT, "polyphony", PROPERTY_HINT_RANGE, "1,128,1"), "set_polyphony", "get_polyphony");
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}
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AudioStreamPolyphonic::AudioStreamPolyphonic() {
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}
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////////////////////////
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void AudioStreamPlaybackPolyphonic::start(double p_from_pos) {
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if (active) {
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stop();
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}
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active = true;
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}
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void AudioStreamPlaybackPolyphonic::stop() {
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if (!active) {
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return;
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}
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bool locked = false;
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for (Stream &s : streams) {
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if (s.active.is_set()) {
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// Need locking because something may still be mixing.
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locked = true;
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AudioServer::get_singleton()->lock();
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}
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s.active.clear();
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s.finish_request.clear();
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s.stream_playback.unref();
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s.stream.unref();
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}
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if (locked) {
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AudioServer::get_singleton()->unlock();
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}
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active = false;
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}
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bool AudioStreamPlaybackPolyphonic::is_playing() const {
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return active;
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}
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int AudioStreamPlaybackPolyphonic::get_loop_count() const {
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return 0;
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}
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double AudioStreamPlaybackPolyphonic::get_playback_position() const {
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return 0;
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}
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void AudioStreamPlaybackPolyphonic::seek(double p_time) {
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// Ignored.
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}
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void AudioStreamPlaybackPolyphonic::tag_used_streams() {
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for (Stream &s : streams) {
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if (s.active.is_set()) {
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s.stream_playback->tag_used_streams();
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}
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}
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}
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int AudioStreamPlaybackPolyphonic::mix(AudioFrame *p_buffer, float p_rate_scale, int p_frames) {
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if (!active) {
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return 0;
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}
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// Pre-clear buffer.
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for (int i = 0; i < p_frames; i++) {
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p_buffer[i] = AudioFrame(0, 0);
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}
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for (Stream &s : streams) {
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if (!s.active.is_set()) {
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continue;
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}
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if (s.stream_playback->get_is_sample()) {
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if (s.finish_request.is_set()) {
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s.active.clear();
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AudioServer::get_singleton()->stop_sample_playback(s.stream_playback->get_sample_playback());
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}
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continue;
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}
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float volume_db = s.volume_db; // Copy because it can be overridden at any time.
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float next_volume = Math::db_to_linear(volume_db);
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s.prev_volume_db = volume_db;
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if (s.finish_request.is_set()) {
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if (s.pending_play.is_set()) {
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// Did not get the chance to play, was finalized too soon.
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s.active.clear();
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continue;
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}
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next_volume = 0;
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}
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if (s.pending_play.is_set()) {
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s.stream_playback->start(s.play_offset);
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s.pending_play.clear();
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}
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float prev_volume = Math::db_to_linear(s.prev_volume_db);
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float volume_inc = (next_volume - prev_volume) / float(p_frames);
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int todo = p_frames;
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int offset = 0;
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float volume = prev_volume;
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bool stream_done = false;
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while (todo) {
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int to_mix = MIN(todo, int(INTERNAL_BUFFER_LEN));
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int mixed = s.stream_playback->mix(internal_buffer, s.pitch_scale, to_mix);
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for (int i = 0; i < to_mix; i++) {
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p_buffer[offset + i] += internal_buffer[i] * volume;
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volume += volume_inc;
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}
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if (mixed < to_mix) {
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// Stream is done.
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s.active.clear();
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stream_done = true;
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break;
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}
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todo -= to_mix;
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offset += to_mix;
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}
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if (stream_done) {
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continue;
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}
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if (s.finish_request.is_set()) {
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s.active.clear();
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}
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}
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return p_frames;
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}
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AudioStreamPlaybackPolyphonic::ID AudioStreamPlaybackPolyphonic::play_stream(const Ref<AudioStream> &p_stream, float p_from_offset, float p_volume_db, float p_pitch_scale, AudioServer::PlaybackType p_playback_type, const StringName &p_bus) {
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ERR_FAIL_COND_V(p_stream.is_null(), INVALID_ID);
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AudioServer::PlaybackType playback_type = p_playback_type == AudioServer::PlaybackType::PLAYBACK_TYPE_DEFAULT
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? AudioServer::get_singleton()->get_default_playback_type()
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: p_playback_type;
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for (uint32_t i = 0; i < streams.size(); i++) {
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if (!streams[i].active.is_set()) {
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// Can use this stream, as it's not active.
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streams[i].stream = p_stream;
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streams[i].stream_playback = streams[i].stream->instantiate_playback();
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streams[i].play_offset = p_from_offset;
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streams[i].volume_db = p_volume_db;
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streams[i].prev_volume_db = p_volume_db;
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streams[i].pitch_scale = p_pitch_scale;
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streams[i].id = id_counter++;
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streams[i].finish_request.clear();
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streams[i].pending_play.set();
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streams[i].active.set();
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// Sample playback.
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if (playback_type == AudioServer::PlaybackType::PLAYBACK_TYPE_SAMPLE && p_stream->can_be_sampled()) {
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streams[i].stream_playback->set_is_sample(true);
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if (!AudioServer::get_singleton()->is_stream_registered_as_sample(p_stream)) {
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AudioServer::get_singleton()->register_stream_as_sample(p_stream);
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}
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float linear_volume = Math::db_to_linear(p_volume_db);
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Ref<AudioSamplePlayback> sp;
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sp.instantiate();
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sp->stream = streams[i].stream;
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sp->offset = p_from_offset;
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sp->volume_vector.resize(4);
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sp->volume_vector.write[0] = AudioFrame(linear_volume, linear_volume);
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sp->volume_vector.write[1] = AudioFrame(linear_volume, /* LFE= */ 1.0f);
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sp->volume_vector.write[2] = AudioFrame(linear_volume, linear_volume);
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sp->volume_vector.write[3] = AudioFrame(linear_volume, linear_volume);
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sp->bus = p_bus;
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streams[i].stream_playback->set_sample_playback(sp);
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AudioServer::get_singleton()->start_sample_playback(sp);
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}
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return (ID(i) << INDEX_SHIFT) | ID(streams[i].id);
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}
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}
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return INVALID_ID;
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}
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AudioStreamPlaybackPolyphonic::Stream *AudioStreamPlaybackPolyphonic::_find_stream(int64_t p_id) {
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uint32_t index = static_cast<uint64_t>(p_id) >> INDEX_SHIFT;
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if (index >= streams.size()) {
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return nullptr;
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}
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if (!streams[index].active.is_set()) {
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return nullptr; // Not active, no longer exists.
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}
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int64_t id = static_cast<uint64_t>(p_id) & ID_MASK;
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if (streams[index].id != id) {
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return nullptr;
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}
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return &streams[index];
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}
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void AudioStreamPlaybackPolyphonic::set_stream_volume(ID p_stream_id, float p_volume_db) {
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Stream *s = _find_stream(p_stream_id);
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if (!s) {
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return;
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}
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s->volume_db = p_volume_db;
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}
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void AudioStreamPlaybackPolyphonic::set_stream_pitch_scale(ID p_stream_id, float p_pitch_scale) {
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Stream *s = _find_stream(p_stream_id);
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if (!s) {
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return;
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}
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s->pitch_scale = p_pitch_scale;
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}
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bool AudioStreamPlaybackPolyphonic::is_stream_playing(ID p_stream_id) const {
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return const_cast<AudioStreamPlaybackPolyphonic *>(this)->_find_stream(p_stream_id) != nullptr;
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}
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void AudioStreamPlaybackPolyphonic::stop_stream(ID p_stream_id) {
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Stream *s = _find_stream(p_stream_id);
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if (!s) {
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return;
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}
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s->finish_request.set();
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}
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void AudioStreamPlaybackPolyphonic::set_is_sample(bool p_is_sample) {
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_is_sample = p_is_sample;
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}
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bool AudioStreamPlaybackPolyphonic::get_is_sample() const {
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return _is_sample;
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}
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Ref<AudioSamplePlayback> AudioStreamPlaybackPolyphonic::get_sample_playback() const {
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return sample_playback;
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}
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void AudioStreamPlaybackPolyphonic::set_sample_playback(const Ref<AudioSamplePlayback> &p_playback) {
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sample_playback = p_playback;
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}
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void AudioStreamPlaybackPolyphonic::_bind_methods() {
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ClassDB::bind_method(D_METHOD("play_stream", "stream", "from_offset", "volume_db", "pitch_scale", "playback_type", "bus"), &AudioStreamPlaybackPolyphonic::play_stream, DEFVAL(0), DEFVAL(0), DEFVAL(1.0), DEFVAL(0), DEFVAL(SceneStringName(Master)));
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ClassDB::bind_method(D_METHOD("set_stream_volume", "stream", "volume_db"), &AudioStreamPlaybackPolyphonic::set_stream_volume);
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ClassDB::bind_method(D_METHOD("set_stream_pitch_scale", "stream", "pitch_scale"), &AudioStreamPlaybackPolyphonic::set_stream_pitch_scale);
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ClassDB::bind_method(D_METHOD("is_stream_playing", "stream"), &AudioStreamPlaybackPolyphonic::is_stream_playing);
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ClassDB::bind_method(D_METHOD("stop_stream", "stream"), &AudioStreamPlaybackPolyphonic::stop_stream);
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BIND_CONSTANT(INVALID_ID);
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}
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AudioStreamPlaybackPolyphonic::AudioStreamPlaybackPolyphonic() {
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}
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